![]() ![]() This reaction is due to the direct toxic effect of the spoiled food and is called food toxicity. Free histamine resulting from bacterial degradation of the flesh in scombroid fish results in scrombotoxicity – a pseudo allergic reaction typified by intense itching, rapid pulse and skin flushing. Toxins and poison may naturally occur in food such as glyco-alkaloids (in potato), cyanogenic glycosides (in beans) and bacterial contaminants. These reactions usually related to the amount of offending additive or chemical in the food and are commonly referred to as food intolerance. Non-Immune mediated reactions may involve food malabsorption due to intestinal enzyme deficiencies (lactose intolerance), adverse reactions to naturally occurring chemicals in food (salicylates, histamine, serotonin and tyramine), as well as reactions to food containing preservatives (sodium benzoate and sulphites), flavourants (monosodium glutamate, aspartame) and colourants (tartrazine). This is true food allergy and accounts for 20% of all adverse reactions to food. They depend on the bowel surface integrity and the individual’s ability to mount an abnormal immune response. These reactions may occur to minute amounts of the offending food in the diet. Four types of Adverse reactions to food occur: Food allergyįood Reactions modulated by the Immune System, these involve immediate hypersensitivity (IgE) and delayed T-cell mediated responses (non-IgE). They have then dealt with the problem by simply avoiding that food without ever seeking the advice of a doctor. Many individuals have themselves noted that they are prone to develop adverse reactions to a specific food. Consequently the general public perceive that food-related allergy is under-diagnosed, whilst most doctors feel that it is over-diagnosed. The true prevalence of food allergy is lower and seems to range from 1% to 4% of the general population and about 6% of the paediatric population, but does occur in as much as 25% of children with eczema. Up to 25% of the population report having had adverse reactions to foods. This is a very common phenomenon and one that is on the increase. Living with Eczema and Atopic Dermatitis.Urticaria, Hives, Nettle Rash or Angioedema. ![]()
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